Method and apparatus for transmitting M2M ranging information in a wireless communication system

Abstract

A method for transmitting Machine to Machine (M2M) ranging information in a wireless communication system is disclosed. The method includes transmitting an Uplink Channel Descriptor (UCD) including an M2M ranging region Type/Length/Value (TLV). When the UCD is transmitted, a ranging region TLV identifying the same region as the M2M ranging region TLV is included in the UCD.

The invention claimed is: 
     
       1. A method for transmitting Machine to Machine (M2M) ranging information at a Base Station (BS) in a wireless communication system, the method comprising:
 transmitting an Uplink Channel Descriptor (UCD) including both a ranging region field configured with a first type of configuration for ranging of a non-M2M device and a M2M ranging region field configured with a second type of configuration for ranging of a M2M device, the M2M ranging region field indicating a M2M ranging region and the ranging region field for the non-M2M device identifying the same M2M ranging region as the M2M ranging region field for the M2M device in the UCD; 
 receiving a ranging code from the M2M device in the M2M ranging region; and 
 transmitting ranging information via a paging message to the M2M device, wherein the ranging region field is neglected by the non-M2M device, the base station does not receive a ranging code from the non-M2M device in the ranging region, and the ranging information in the paging message is not transmitted to the non-M2M device. 
 
     
     
       2. The method according to  claim 1 , wherein a dedicated ranging indicator is set to 1 in the ranging region field of the UCD. 
     
     
       3. The method according to  claim 1 , wherein the M2M ranging region specified by the M2M ranging region field is indicated by an Orthogonal Frequency Division Multiple Access (OFDMA) symbol offset, a subchannel offset, the number of OFDMA symbols, and the number of subchannels. 
     
     
       4. The method according to  claim 1 , wherein the M2M ranging region specified by the ranging region field is indicated by an OFDMA symbol offset, a subchannel offset, the number of OFDMA symbols, and the number of subchannels. 
     
     
       5. The method according to  claim 1 , wherein the M2M ranging region specified by the M2M ranging region field is used for the M2M device to transmit a ranging code. 
     
     
       6. A method for receiving Machine to Machine (M2M) ranging information at an M2M device in a wireless communication system, the method comprising:
 receiving an Uplink Channel Descriptor (UCD) including both a ranging region field configured with a first type of configuration for ranging of a non-M2M device and a M2M ranging region field configured with a second type of configuration for ranging of the M2M device, the M2M ranging region field indicating a M2M ranging region and the ranging region field for the non-M2M device identifying the same M2M ranging region as the M2M ranging region field for the M2M device, 
 transmitting a ranging code in the M2M ranging region; and 
 receiving ranging information via a paging message, wherein the ranging region field is neglected by the non-M2M device, the base station does not receive a ranging code from the non-M2M device in the ranging region, and the ranging information in the paging message is not transmitted to the non-M2M device. 
 
     
     
       7. The method according to  claim 6 , wherein a dedicated ranging indicator is set to 1 in the ranging region field of the UCD. 
     
     
       8. The method according to  claim 6 , wherein the M2M ranging region specified by the M2M ranging region field is indicated by an Orthogonal Frequency Division Multiple Access (OFDMA) symbol offset, a subchannel offset, the number of OFDMA symbols, and the number of subchannels. 
     
     
       9. The method according to  claim 6 , wherein the M2M ranging region specified by the ranging region field is indicated by an OFDMA symbol offset, a subchannel offset, the number of OFDMA symbols, and the number of subchannels. 
     
     
       10. The method according to  claim 6 , wherein the non-M2M device does not receive the paging message including the ranging information, and the non-M2M device neglects the ranging region field. 
     
     
       11. The method according to  claim 6 , further comprising transmitting a ranging code using M2M ranging region field set by the M2M ranging region field. 
     
     
       12. A Base Station (BS) for transmitting Machine to Machine (M2M) ranging information in a wireless communication system, the BS comprising:
 a Radio Frequency (RF) unit; and 
 a processor that controls the RF unit to: 
 transmit an Uplink Channel Descriptor (UCD) including both a ranging region field configured with a first type of configuration for ranging of a non-M2M device and a M2M ranging region field configured with a second type of configuration for ranging of a M2M device, the M2M ranging region field indicating a M2M ranging region and the ranging region field for the non-M2M device identifying the same M2M ranging region as the M2M ranging region field for the M2M device in the UCD, 
 receive a ranging code from the M2M device in the M2M ranging region; and 
 transmit ranging information via a paging message to the M2M device, wherein the ranging region field is neglected by the non-M2M device, the base station does not receive a ranging code from the non-M2M device in the ranging region, and the ranging information in the paging message is not transmitted to the non-M2M device. 
 
     
     
       13. A Machine to Machine (M2M) device for receiving M2M ranging information in a wireless communication system, the M2M device comprising:
 a Radio Frequency (RF) unit; and 
 a processor that controls the RF unit to: 
 receive an Uplink Channel Descriptor (UCD) including both a ranging region field having a first type of configuration for ranging of a non-M2M device and a M2M ranging region field having a second type of configuration for ranging of the M2M device, the M2M ranging region field indicating a M2M ranging region and the ranging region field for the non-M2M device identifying the same M2M ranging region as the M2M ranging region field for the M2M device, 
 transmit a ranging code in the ranging region; and 
 receive ranging information via a paging message, wherein the ranging region field is neglected by the non-M2M device, the base station does not receive a ranging code from the non-M2M device in the ranging region, and the ranging information in the paging message is not transmitted to the non-M2M device, and the non-M2M device neglects the ranging region field.